I used a normal hammer. The key is to hit the rotor where the bolt holes are. If all else fails, something will happen to the rotor, but why do you care if you are replacing it? In all seriousness, though, I banged around the holes (where the points of contact are weakest) and had no problems getting the rotors off after about 5 or 6 solid swings. On another note, anyone know where I can find some cheap rear rotors for a 98 ML320?

Chris Warner, Lt, USAF
AC-130 Pilot